Ebac CD425 User manual

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
EBAC MODEL CD425
DEHUMIDIFIER
OWNER’S MANUAL
Ebac Commercial Ltd
St Helens Trading Estate
Bishop Auckland
Co. Durham
DL14 9AD
Telephone: [phone] Fax: [phone]
Website: www.ebacuk.com
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
INTRODUCTION
Dehumidifiers remove moisture from the air that is circulating through the unit. The resulting
reduction of relative humidity helps prevent rust, rot, mould, mildew and condensation within
the room, or other enclosed spaces where the dehumidifier is used.
A dehumidifier consists of a motor-compressor unit, a refrigerant condenser, an air circulating
fan, a refrigerated surface, a means of collecting and disposing the condensed moisture and a
cabinet to house these components.
The fan draws air through the refrigerated surface and cools it below its dew point, removing
moisture which is collected and led away. The cool air then passes the hot condenser, where it is
reheated. With the addition of other radiated heat the air is discharged into the room at a higher
temperature but lower relative humidity than when the air entered the unit. Continuous
circulation of the room air through the dehumidifier unit gradually reduces the relative humidity
in the room.
The CD425 is a self contained low temperature dehumidifier. All electrical contactors,
overloads, etc, are housed in an electrical box built inside the unit. The unit is equipped with a
defrost valve which energises every 42 minutes to clear any ice formation on the evaporator
coils. This allows the unit to operate at much lower temperatures. The control panel gives
indication of the set humidity, drying and defrosts status.
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
SPECIFICATIONS
MODEL: CD425
HEIGHT: 1190mm
WIDTH: 1100mm
DEPTH: 460mm
WEIGHT: 160 Kg
AIRFLOW: 3000 M3/hr
POWER SUPPLY: 380-415V, 3 ph, 50Hz
POWER 6.0 Kw (max)
FINISH: Vinyl coated steel
REFRIGERANT TYPE/QTY:R407c (2.5Kg)
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
INSTALLATION
POSITIONING:
Position the dehumidifier unit in the centre of the room to be conditioned if at all possible.
Using a spirit level ensure the unit is level in both directions. Failure to do so may result in the
drain tray overflowing and flooding of the chamber.
NOTE: Both inlet grille and outlet grille of the dehumidifier unit must have clear space around
them and not be obstructed in anyway.
WIRING:
Connect a suitably fused 3 phase mains power supply to the MAINS T/B terminal block inside
the electrical box located at the control panel end of the machine.
DRAINAGE:
Connect the outlet from the drain tray (located behind the front grille and under the evaporator
coils) to a permanent drain. Please ensure that the drainage does not rise above the level of the
CD425’s drain tray. Failure to observe this requirement will result in internal flooding of the
dehumidifier unit.
.
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
OPERATION
The operation of the dehumidifier is to remove moisture from the air by having it condense on
the cold tubes of the evaporator coil. The air then passes over the hot condenser coil and returns
to the conditioned space slightly warmer and dryer than when it entered the dehumidifier unit.
To concentrate drying all doors and windows should be kept closed.
Test for Correct Operation
WARNING: DO NOT RUN THE MACHINE WITHOUT THE COVERS IN
PLACE FOR ANY LONGER THAN NECESSARY. DO NOT
REMOVE/REPLACE THE COVERS WITH THE POWER ON.
1. After unpacking connect the unit to a 380/415V, 3Ph, 50Hz – 4 wire power supply
2. Switch the machine to the on position and check for correct fan rotation. (Air blows out of
the top of the machine).
3. Check dehumidification process:
a) Remove front cover
b) Check actual relative humidity inside the area
c) Set humidity control to a lower value than the actual relative humidity
d) After approximately 6 minutes check the compressor is running
e) Leave the machine to run for 15 minutes. (NOTE: ensure that the set humidity,
see c) above, is set very low as the compressor will switch off when the actual RH
coincides with the set point)
f) Observe the evaporator coils
i) If the air temperature is below 20°C, an even coating of ice should cover
the entire evaporator coil
ii) If the temperature is above 20°C, droplets of condensed water should
cover the entire evaporator coil.
4. Leave the unit to run for a further 27 minutes, after which the unit should go through a 4
minute defrost cycle.
During the defrost cycle the defrost solenoid valve is energized and a warming of the
evaporator coil can be felt.
If after carrying out the above checks the unit does not appear to function correctly, refer to
your supplier.
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
ROUTINE MAINTENANCE
WARNING: ENSURE THAT THE POWER CORD TO THE MACHINE
HAS BEEN DISCONNECTED BEFORE CARRYING OUT
ROUTINE MAINTENANCE ON ITEMS 1, 2, 4, 5, AND 6.
To ensure continued full efficiency of the dehumidifier, maintenance procedures should be
performed as follows:
1. Clean the surface of the evaporator and condenser coils by blowing the dirt out from
behind the fins with compressed air. Hold the nozzle of the air hose away from the
coil (approx 6”) to avoid damaging the fins. Alternatively, vacuum clean the coils.
WARNING: DO NOT STEAM CLEAN REFRIGERATION COILS.
2. Check that the fan is firmly secured to the motor shaft and that the fan rotates freely.
THE FAN IS SEALED FOR LIFE AND DOES NOT NEED LUBRICATING.
3. To check the refrigerant charge, run the unit for 15 minutes (with humidistat set to
maximum) and briefly remove the cover. The evaporator coil should be evenly frost
coated across its surface. At temperatures above 20°C, the coil may be covered with
droplets of water rather than frost. Partial frosting accompanied by frosting of the
thin capillary tubes, indicates loss of refrigerant gas or low charge.
4. Check all wiring connections.
5. The bolts retaining the compressor and fan should be inspected to ensure they have
not become loose. Check the insulation sleeves on the refrigeration Pipework have
not become detached.
6. Inspect the drain tray for water marking. If marking is excessive check the drain pipe
for blockage.
7. To check the operation of the defrost system, switch the machine on and leave it
running for approximately 55 minutes in temperatures below 20°C. The machine will
then enter defrost mode for approximately 5 minutes, before returning to normal
operation. If the unit will not defrost, replace the printed circuit board. If the
machine is still not defrosting, replace the by-pass valve. Check the machine again
after a further hour of operation to determine that the valve is working correctly.
IF ANY OF THE PRECEDING PROBLEMS OCCUR,CONTACT THE EBAC SERVICE CENTER
PRIOR TO CONTINUED OPERATION OF THE UNIT TO PREVENT PERMANENT DAMAGE.
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
REPAIRS
1. Should an electrical component fail, consult the Factory Service Center to obtain the
correct replacement part.
2. If refrigerant gas is lost from the machine, it will be necessary to use a refrigeration
technician to correct the fault. Contact the Factory Service Center prior to initiating
this action.
Any competent refrigeration technician will be able to service the equipment. The
following procedure must be used:
a. The source of the leak must be determined and corrected.
b. The machine should be thoroughly evacuated before recharging.
c. The unit must be recharged with refrigerant measured accurately by weight.
d. For evacuation and recharging of the machine, use the crimped and brazed
charging stub attached to the side of the refrigerant compressor.
The charging stub should be crimped and rebrazed after servicing. NEVER allow
permanent service valves to be fitted to any part of the circuit. Service valves
may leak causing further loss of refrigerant gas.
3. The refrigerant compressor fitted to the dehumidifier is a durable unit that should
give many years of service. Compressor failure can result from the machine losing its
refrigerant gas. The compressor can be replaced by a competent refrigeration
technician.
Failure of the compressor can be confirmed by the following procedure:
a. Establish that power is present at the compressor terminals using a voltmeter.
b. With the power disconnected, check the continuity of the internal winding by
using meter across the compressor terminals. An open circuit indicates that the
compressor should be replaced.
c. Check that the compressor is not grounded by establishing that a circuit does not
exist between the compressor terminals and the shell of the compressor.
CD425 OWNERS MANUAL

Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
TROUBLESHOOTING
SYMPTOM CAUSE REMEDY
Little or no airflow
1. Loose fan on shaft
2. Fan motor burnt out
3. Dirty refrigeration coils
4. Loose electrical wiring
5. Fuse blown
1. Tighten fan
2. Replace the fan motor
3. See Routine Maintenance Section
4. Check the wiring diagram to find
fault and repair
5. Replace the fuse or reset the circuit
breaker
Little or no water extraction
1. Insufficient air flow
2. Compressor fault
3. Loss of refrigerant gas
1. Check all of the above
2. Contact the Factory Service Center
3. Contact the Factory Service Center
Little or no defrost when
required
1. Faulty Timer
2. Faulty bypass valve
1. Contact the Factory Service Center
2. Contact the Factory Service Center
Unit vibrates excessively 1. Loose compressor mounts
2. Damaged fan
1. Tighten nuts on compressor mounts
2. Replace with a new fan
Water flooding inside
machine
1. Drain pipe blocked/frozen
2. Drain pipe too high
1. Clear the obstruction
2. Lower section of pipe
Ebac Commercial Ltd
St Helens Trading Estate
Bishop Auckland
Co. Durham
DL14 9AD
Telephone: [phone] Fax: [phone]
Website: www.ebacuk.com
CD425 OWNERS MANUAL

CD425 OWNERS MANUAL
Drawing No. :- TPC127a
Issue :- 1
Date :- 26/06/03
CD425
SPARE PARTS LIST
NUMBER DESCRIPTION
PART
NUMBER QUANTITY
1 Compressor 3944919 1
2 Axial Fan 3040119 1
3 12V 100mA Filament 3034522 1
4 Condenser Coil 3020725 1
5 Evaporator Coil 3020733 3
6 Reversible Filter Dryer 3020930 1
7 Fan Motor Assembly 3030130 1
8 Defrost Valve 3020815 1
9 Electronic Timer 1601200 1
10 Aux Contactor 3030354 5
11 Aux Contactor 3030350 1
12 Terminal Block 3031460 1
13 Solenoid Coil 3030449 1
14 Contactor 3030362 1
15 Power Cord 3035148 27ft
16 Drain Tray 2131107 1
17 Drain tube P-clip 3035697 1
18 Drain Tubing 3014315 25ft